Door threshold seal structure and device

Abstract

A door lower opening sealing structure and device, comprising a mounting piece and a balancing piece; the mounting piece is used to form a bearing platform bearing the balancing piece and is hung on a door panel; the mounting piece has a rotating pivot point; the balancing piece has a retaining end and a limiting end connected to each other; when the connecting part of the retaining end and the limiting end falls on the rotating pivot point, the retaining end and the limiting end are respectively located on the two sides of the rotating pivot point, and the balancing piece can rotate around the rotating pivot point; the retaining end is provided with a counterweight on the side close to the mounting piece, and the counterweight is used to drive the retaining end to rotate towards the ground; the limiting end is further provided with a sealing strip. The application can complete the sealing of the door lower opening at the same time of closing the door, without additional steps, and the operation is simple, convenient and fast. The device no longer needs a spring or a motor, is simple and clear, has high reliability, good durability, and is convenient and fast for later maintenance.

Description

Technical Field

[0001] This invention relates to the field of sealing technology, and more specifically, to a door bottom sealing structure and device. Background Technology

[0002] In existing door panels, a gap exists between the bottom of the door panel and the ground for easy opening and closing, to prevent friction between the bottom of the door panel and the ground and affect the opening and closing of the door panel. However, this gap will prevent the room from being completely sealed. In situations where sound insulation, windproofing, or other situations that require a high degree of room sealing, the gap under the door will cause the room to fail to be sealed, affecting its use.

[0003] Therefore, a rubber strip is usually installed at the bottom of the door panel to seal the gap between the bottom edge of the door panel and the ground. This method can reduce noise transmission to some extent, but if the rubber strip is too tight, the friction between the rubber strip and the ground can make it difficult for the door to close. If the rubber strip is too loose, it will still not achieve a sealing effect.

[0004] Most existing solutions use mechanical or electronic devices such as springs and motors. In practical applications, due to the limitations of the components themselves, some doors cannot be installed because of width restrictions; the length of the components cannot be adjusted automatically; and it is inconvenient to repair or replace the device if it is damaged. Summary of the Invention

[0005] Firstly, the purpose of this invention is to provide a door bottom sealing structure. By incorporating a rotatable balancing member, the balancing member can rotate in conjunction with a blocking member. Simultaneously, a sealing strip on the balancing member seals the gap under the door panel, thus achieving a seal. Furthermore, this sealing structure is not limited by the minimum door width, nor by the door's opening direction or the installation position of the door hinge.

[0006] Secondly, the present invention provides a doorway sealing device. By setting up a retractable balancing component and a mounting component, the user can easily adjust the coverage length of the balancing component and the mounting component according to actual usage needs, eliminating the need for customized length matching the door panel and improving the versatility and convenience of use.

[0007] This invention is achieved through the following technical solution:

[0008] A door bottom sealing structure includes an mounting component and a balancing component. The mounting component forms a support platform for the balancing component and is hung on the door panel. The mounting component has a pivot point. The balancing component has a retaining end and a limiting end connected together. When the connection between the retaining end and the limiting end falls on the pivot point, the retaining end and the limiting end are located on opposite sides of the pivot point, and the balancing component can rotate around the pivot point. The retaining end has a counterweight on the side near the mounting component, which drives the retaining end to rotate toward the ground. The limiting end also has a sealing strip.

[0009] In the above technical solution, the mounting component is fixed to the door panel and serves as the mounting base for the sealing device. The balancing component rotates around the pivot point on the mounting component. When the door panel is closed, the limiting end can cooperate with an external force object along the closing path to drive the balancing component to rotate. At the same time, a sealing strip is provided on the limiting end. While the limiting end rotates, the sealing strip is located in the gap below the door panel, i.e., the bottom opening of the door, to achieve the sealing function. When the door is opened, it returns to the initial position, and the holding end rotates towards the ground under the drive of the counterweight. At the same time, the limiting end rotates away from the ground to avoid friction between the limiting component and the sealing strip and the ground, which would affect the opening of the door panel.

[0010] Furthermore, the balancing component includes a first balancing section and a second balancing section. The ends of the first balancing section and the second balancing section are fixedly connected to form a corner structure. The corner structure is mounted on a rotation fulcrum. The end of the first balancing section away from the second balancing section is a limiting end, and the end of the second balancing section away from the first balancing section is a holding end.

[0011] Furthermore, one side of the limiting end is a mating surface, which is used to mate with the blocking component; the other side of the limiting end is a connecting surface, which is used to connect the sealing strip.

[0012] Furthermore, a limiting protrusion is provided on the side of the corner structure away from the pivot point. When the balancer rotates around the pivot point, the limiting protrusion is used to prevent the balancer from detaching from the mounting component.

[0013] Furthermore, the mounting component is configured as an enclosure structure, which gives the mounting component an axial cavity formed along its extension direction. An axial opening is provided on one side of the mounting component, the pivot point is located at the axial opening of the mounting component, the first balancing section extends out relative to the axial opening, and the second balancing section is located in the axial cavity of the enclosure structure.

[0014] Furthermore, end caps are provided on both sides of the mounting component.

[0015] On the other hand, the present invention also provides a door bottom sealing device, including the above-mentioned door bottom sealing structure, wherein the balancing member includes a first balancing member and a second balancing member that slide and match each other, the first balancing member overlaps at the rotation fulcrum of the mounting member, and the second balancing member is placed on the side of the first balancing member away from the mounting member.

[0016] Furthermore, the balancing component has at least one first balancing component and at least one second balancing component, which are arranged alternately.

[0017] Furthermore, the mounting component includes a first mounting component and a second mounting component. The first mounting component has a mounting groove on one side that slides and matches the second mounting component. The second mounting component also has a protective structure with an opening on one side and a second axial cavity. When the second mounting component is slidably sleeved on the first mounting component, the second mounting component can slide within the axial cavity of the first mounting component. When the first mounting component and the second mounting component are engaged with the balancing component, the retaining end is located in the communicating cavity formed by the axial cavity and the second axial cavity, and the limiting end extends out relative to each other in sequence.

[0018] Furthermore, the mounting component has at least one first mounting component and at least one second mounting component, which are arranged sequentially at intervals.

[0019] Furthermore, the first and second mounting components are slidably fixed by fasteners.

[0020] Furthermore, the blocking component is a first magnetic attraction component, and the limiting end is fixed with a second magnetic attraction component, and the first magnetic attraction component can attract the second magnetic attraction component.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] This invention utilizes mounting components as both mounting bases and rotation fulcrums, preventing damage to the door panel's structure. The balancing component rotates through the fulcrum, changing the height of the limiting and retaining ends. Through the cooperation of the blocking component and the limiting end, the limiting end rotates relative to the first rotation fulcrum during door closing, allowing the sealing strip on the limiting end to seal the bottom of the door. This seals the room during closing without requiring additional steps. During door opening, the balancing component returns to its initial position, and under the action of the counterweight at the retaining end, it rotates, moving the limiting end and sealing strip away from the ground without affecting the normal opening of the door panel. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the installation structure of an inward-opening door according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the installation structure of an outward-opening door according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the first mounting component being sleeved outside the second mounting component according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the mounting component structure according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the balancing component structure according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the embedded installation structure of an inward / outward opening door according to an embodiment of the present invention.

[0030] The attached diagram shows the markings and corresponding component names:

[0031] 1-Mounting component, 11-Axial cavity, 12-Rotation fulcrum, 13-Connecting part, 14-First mounting component, 15-Second mounting component, 16-Second axial cavity, 2-Balancing component, 21-Limiting end, 22-Retaining end, 23-First balancing component, 24-Second balancing component, 25-Corner structure, 3-Sealing strip, 4-Blocking component, 5-Counterweight component, 6-Limiting protrusion, 7-Fixing component, 8-End cap, 92-First balancing section, 91-Second balancing section. Implementation

[0032] This embodiment provides a sealing device for the gap under a door, such as... Figures 1 to 4As shown, the device includes a mounting component 1 and a balancing component 2. The mounting component 1 forms a support platform for the balancing component 2 and is hung on the door panel via a connecting part 13. The connecting part 13 can be fixed to the door panel by adhesive or nails. The mounting component 1 has a pivot point 12. The balancing component 2 has a retaining end 22 and a limiting end 21 connected to each other. When the connection between the retaining end 22 and the limiting end 21 falls on the pivot point 12, the retaining end 22 and the limiting end 21 are located on opposite sides of the pivot point 12, and the balancing component 2 can rotate around the pivot point 12. The retaining end 22 has a counterweight 5 on the side near the mounting component 1, which drives the retaining end 22 to rotate toward the ground. The limiting end 21 also has a sealing strip 3.

[0033] In practical use, the mounting component 1 is installed on the door panel. After the balance component 2 is attached to the mounting component 1, it can rotate around the pivot point 12, thereby changing the position of the sealing strip 3. The connection between the retaining end 22 and the limiting end 21 refers to the position where the limiting end 21 and the retaining end 22 form an angle. Then, the blocking component 4 can be set at the end point of the outer moving path of the door panel. When the door panel is closed, it acts on the limiting end 21 and causes the balance component 2 to rotate, so that when the door panel is closed in place, the sealing strip 3 seals the gap under the door. After the door panel is closed, the blocking component 4 will drive the limiting end 21 to rotate to the appropriate position, so that the sealing strip 3 on the limiting end 21 is located at the gap between the door panel and the ground. The sealing strip 3 seals the gap. The balancing component 2 supports the sealing strip 3, allowing it to accurately seal the gap. The sealing strip 3 is made of flexible material, which can fully block the gap. The sealing strip 3 can also be made of sound-insulating material or sound-insulating sponge for sound insulation. The balancing component 2 is a structure that can extend and retract axially. During installation, the user can adjust the length of the balancing component 2 according to the width of the door panel. The mounting component 1 is used for installation with the door panel and supports the balancing component 2. The blocking component 4 is set at the end of the door panel's closing path, next to the door frame or on the ground. It is usually set on the door frame or the wall on which the door frame is located, without affecting the user's movement. When installing the mounting component 1, attention should be paid to its direction so that the balancing component 2 rotates after contacting the blocking component 4, allowing the sealing strip 3 to seal the gap.

[0034] The structure of balancer 2 is as follows Figure 5As shown, the balancing component 2 includes a first balancing component 23 and a second balancing component 24 that are slidably disposed. The first balancing component 23 includes a first balancing segment 92 and a second balancing segment 91. The end of the first balancing segment 92 and the end of the second balancing segment 91 are fixedly connected to form a corner structure 25. The corner structure 25 is mounted on the rotation fulcrum 12. The end of the first balancing segment 92 away from the second balancing segment 91 is a limiting end 21, and the end of the second balancing segment 91 away from the first balancing segment 92 is a holding end 22. The first balancing component 23 can be rotatably attached to the pivot point 12. The first balancing component 23 is mainly rotatably connected to the mounting component 1. The second balancing component 24 is located on the side of the first balancing component 23 away from the first pivot point. The end of the second balancing component 24 away from the mounting component 1 is also a limiting end 21. This end is fixedly connected to the sealing strip 3. The second balancing component 24 is an extension of the first balancing component 23. The sealing strip 3 is fixed to the limiting end 21 of the first balancing component 23 and the end of the second balancing component 24 away from the mounting component 1. The first balancing component 23 can rotate around the pivot point 12. The second balancing component 24 and the first balancing component 23 together support the sealing strip 3, so that the sealing strip 3 can accurately seal the gap under the door.

[0035] To ensure the stability of the overlapping rotating connection structure between the first balancer 23 and the mounting end, the first balancer 23 has a corner structure 25. The corner of the corner structure 25 is the middle part of the first balancer 23. The corner structure 25 is rotatably overlapped on the rotation fulcrum 12. One end of the corner structure 25 is a holding end 22, and the other end is a limiting end 21. The holding end 22 is fixed with a counterweight 5. The counterweight 5 can drive the first balancer 23 to rotate around the rotation fulcrum 12, so that the limiting end 21 rotates towards the mounting part 1. When the limiting end 21 is not engaged with the blocking part 4, the presence of the counterweight 5 keeps the limiting end 21 away from the ground below the door panel, thereby avoiding the situation where the sealing strip 3 rubs against the ground when the door panel is opened and closed and the limiting end 21 separates from the blocking part 4, which would make it difficult to open and close the door. When the limiting end 21 contacts the door panel, the balance member 2 rotates, causing the height of the counterweight 5 to rise. When the limiting end 21 separates from the door panel, due to the presence of the counterweight 5, the weight of the counterweight 5 causes the balance member 2 to rotate, the height of the counterweight 5 to decrease, and the height of the limiting end 21 to rise, causing the limiting end 21 to move away from the ground. The counterweight 5 is generally a strip structure made of a high-density material, which can be made of metal, wood, or plastic, or simply a protrusion set on the balance member 2 to increase the weight of the retaining end 22. This embodiment will not be described in detail.

[0036] A limiting protrusion 6 is provided on the side of the corner structure 25 away from the rotation fulcrum 12. When the first balancer 23 rotates around the rotation fulcrum 12, the limiting protrusion 6 is used to prevent the first balancer 23 from disengaging from the axial cavity 11 of the mounting part 1, so that the limiting protrusion 6 remains in the axial cavity 11 and will not disengage. This avoids the situation where the corner structure 25 falls directly out of the axial opening when the balancer 2 rotates too much on the rotation fulcrum 12. In this embodiment, the position of the limiting protrusion 6 is as follows: Figure 2 and Figure 5 As shown, the limiting protrusion 6 is a structure formed by protruding at the corner of the corner structure 25 or on both sides of the corner structure 25 in a direction away from the rotation fulcrum 12.

[0037] After the user adjusts the lengths of the first balancer 23 and the second balancer 24 to a suitable position and determines the length of the balancer 2, the first balancer 23 and the second balancer 24 can be fixedly connected using adhesive. Adhesive is convenient to use and inexpensive. In other embodiments, a buckle or screw structure can also be selected for fixing.

[0038] In addition, to adapt this embodiment to door panels or other obstructions of different widths, the balancing component 2 has at least one first balancing component 23 and at least one second balancing component 24, which are arranged alternately. The number of first balancing components 23 and second balancing components 24 can be selected according to actual needs. In normal use, one second balancing component 24 is sufficient to adjust the entire balancing component 2 to a suitable length position. When the required length of the balancing component 2 is longer, two second balancing components 24 can be used. The two second balancing components 24 are located on both sides of the first balancing component 23 and are slidably connected to the first balancing component 23 to adjust the length of the balancing component 2, so that the length adjustment range of the balancing component 2 is wider. In other embodiments, two first balancing components 23 can also be used on both sides of the second balancing component 24 to adjust the length of the balancing component 2. Alternatively, multiple first balancing components 23 and multiple second balancing components 24 can be arranged alternately to increase the length of the balancing component 2.

[0039] The sealing strip 3 is installed on the side of the limiting end 21 away from the rotation fulcrum 12. When the limiting end 21 contacts the blocking member 4, the side of the limiting end 21 without the sealing strip 3 is in contact with the blocking member 4, so as to avoid the sealing strip 3 being squeezed between the limiting end 21 and the blocking member 4.

[0040] For the sake of the overall aesthetics of the sealing device and better adaptability, the mounting component 1 is also designed to extend and retract along the rotation axis of the rotation fulcrum 12. The length of the mounting component 1 can also be changed to accommodate the balancing component 2, preventing it from being exposed and thus easily displaced under external forces. In this embodiment, the angle between the plane containing the first balancing segment 92 and the plane containing the second balancing segment 91 can range from 0 degrees to 180 degrees, specifically, it can be 90 degrees. Figure 1 As shown, it can also be other degrees, such as Figure 6 As shown. Within this angle range, the corner structure 25 will not detach from the rotation fulcrum 12 at will, and can also rotate on the rotation fulcrum 12. For ease of rotation, the surface of the corner structure 25 near the rotation fulcrum 12 is a smooth curved surface. When the corner structure 25 rotates, the rotation is smooth, and the sealing strip 3 can smoothly seal the bottom of the door. At the same time, the surface of the rotation fulcrum 12 is also a smooth curved surface. In other embodiments, the rotation fulcrum 12 can also be a planar structure. The end of the first rotation fulcrum 12 forms a right angle, an acute angle, or an obtuse angle. The rotation fulcrum 12 with an angle can also cooperate with the corner structure 25.

[0041] The structure of mounting component 1 is as follows: Figure 4 As shown, the mounting component 1 includes a first mounting component 14 and a second mounting component 15 that are slidably connected. A mounting groove is located on one side of the first mounting component 14, and the mounting groove is structurally compatible with the second mounting component 15 to ensure that the balancer 2 can rotate smoothly. The second mounting component 15 also has a protective structure with an opening on one side and a second axial cavity 16. When the second mounting component 15 is slidably fitted onto the first mounting component 14, it can slide within the axial cavity 11 of the first mounting component 14. When the first mounting component 14 and the second mounting component 15 cooperate with the balancer 2, the retaining end 22 is located in the communicating cavity formed by the axial cavity 11 and the second axial cavity 16, and the limiting end 21 extends outwards sequentially. In this way, the first mounting part 14 is rotatably connected to the balance part 2, and the second mounting part 15, as an extension of the first mounting part 14, together with the first mounting part 14, forms a protective barrier for the balance part 2 to prevent damage to the balance part 2. In order to ensure the connection stability between the mounting part 1 and the door panel, the first mounting part 14 is generally fitted over the second mounting part 15. The second mounting part 15, as an extension, can adapt to different door panel widths. The first mounting part 14, as the main body of the rotation support, is longer than the second mounting part 15. Installing the first mounting part 14 on the door panel will make the overall structure more stable. The mounting part 1 is provided with end caps 8 at both ends to prevent the balance part 2 from sliding out of the port of the mounting part 1.

[0042] Mounting component 1 has at least one first mounting component 14 and at least one second mounting component 15, which are arranged alternately. In this embodiment, generally one first mounting component 14 and one second mounting component 15 are selected. In order to increase the overall length of mounting component 12, two first mounting components 14 can be selected, which are slidably sleeved on both sides of the second mounting component 15. Alternatively, two second mounting components 15 can be selected, which are slidably sleeved on both sides of the first mounting component 14. In other embodiments, multiple second mounting components 15 and multiple first mounting components 14 can be selected, with the first mounting components 14 and the second mounting components 15 arranged alternately to increase the overall length of mounting component 1.

[0043] It should be noted that when selecting an appropriate number of first mounting parts 14 and second mounting parts 15, as well as first balancing parts 23 and second balancing parts 24, it is necessary to ensure that the corner structure 25 of the first balancing part 23 can be rotatably connected to the rotation fulcrum 12 of the first mounting part 14 to ensure the normal operation of the sealing device.

[0044] The first mounting component 14 and the second mounting component 15 are fixedly connected by fasteners 7 such as adhesive or screws. After the positions of the first mounting component 14 and the second mounting component 15 are adjusted, they can be fixed in place by adhesive or by using fasteners 7. Specifically, as an optional method, such as... Figure 4 As shown, both the first mounting member 14 and the second mounting member 15 are provided with grooves. The screw passes through the groove from the inside of the mounting member 1, and the nut is threadedly connected to the part of the screw that passes through the groove. By tightening the nut, the distance between the nut and the screw is shortened, thereby fixing the position between the first mounting member 14 and the second mounting member 15. Furthermore, a support structure can be provided on the inner mounting member 1 to support the screw and prevent the screw from directly detaching from the groove when the nut is detached from the screw. In other embodiments, threaded holes can be directly provided on the first mounting member 14 or the second mounting member 15, and the screw can be used to pass through the threaded hole and abut against the other to fix the position of both. In actual use, the appropriate fixing method can be selected according to the actual needs.

[0045] In this embodiment, the rotation fulcrum 12 refers to the edge of the axial opening provided on the first mounting member 14. In this embodiment, one side of the enclosing structure of any mounting member 1 is inclined, and the edge end of that side is the rotation fulcrum 12. When the holding end 22 of the balance member 2 is driven to rotate under the gravity of the counterweight 5, the holding end 22 is located in the area formed by the inclined side and the inner wall of the axial cavity 11, such as... Figure 1 and 2 As shown.

[0046] The sealing device formed in this embodiment can be installed on an inward-opening door, such as... Figure 1 As shown, the pivot point 12 is positioned away from the door panel, and the sealing strip 3 is also positioned away from the door panel. It can also be installed on outward-opening doors, such as... Figure 2 As shown, the pivot point 12 is located near the door panel. In other embodiments, the mounting component 1 can also be located inside the door panel to ensure that both sides of the door panel are smooth and clean.

[0047] When installing the blocking component 4, it is generally placed at the junction of the door frame and the ground, so as not to affect people's normal passage when the door is open. The blocking component 4 is generally a block structure. For doors with structures such as double doors and floor spring doors, it is not convenient to set the blocking component 4 like ordinary single doors. In this embodiment, the rotation of the balancing component 2 can be achieved by magnetic attraction. Specifically, the blocking component 4 is set as the first magnetic attraction component, and the limiting end 21 is fixed with the second magnetic attraction component. The first magnetic attraction component can attract the second magnetic attraction component. The first magnetic attraction component and the second magnetic attraction component can both be magnets, or one of them can be a magnet and the other can be an iron sheet, iron block or other structure that can be attracted. The blocking component 4 is embedded in the ground, so it will not affect people's normal passage. When the door is closed, the first magnetic attraction component and the second magnetic attraction component are attracted together, and the balancing component 2 rotates to seal the bottom of the door. When the door is opened, the first magnetic attraction component and the second magnetic attraction component are separated, and the balancing component 2 rotates under the drive of the counterweight to release the seal on the bottom of the door.

[0048] This embodiment, by setting up a retractable mounting component 1 and a balancing component 2, adapts to door panels of different sizes, avoiding the process of customizing the balancing component 2 and mounting component 1 according to the door panel, thus improving the ease of use and application range of the sealing device, and making it easier to operate.

[0049] And please refer to it again. Figure 6 As an alternative, the mounting components can be fixed to the door panel not only by adhesive or nails, but also embedded within the door panel. That is, for aesthetic purposes, the mounting components and balancing components of this embodiment can be produced simultaneously with the door panel, allowing them to be embedded within the door and not affecting the integrated aesthetics of the interior and exterior.

[0050] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A sealing structure for the bottom opening of a door, characterized in that, Includes mounting component (1) and balancing component (2); The mounting component (1) is used to form a support platform for supporting the balance component (2), which is hung on the door panel; the mounting component (1) has a rotation fulcrum (12). The balancing component (2) has a retaining end (22) and a limiting end (21) connected together. When the connection between the retaining end (22) and the limiting end (21) falls on the rotation fulcrum (12), the retaining end (22) and the limiting end (21) are located on both sides of the rotation fulcrum (12), and the balancing component (2) can rotate around the rotation fulcrum (12). The retaining end (22) is provided with a counterweight (5) on the side close to the mounting component (1). The counterweight (5) is used to drive the retaining end (22) to rotate toward the ground. The limiting end (21) is also provided with a sealing strip (3).

2. The door bottom sealing structure according to claim 1, characterized in that, The balancing component (2) includes a first balancing section (92) and a second balancing section (91). The end of the first balancing section (92) and the end of the second balancing section (91) are fixedly connected to form a corner structure (25). The corner structure (25) is mounted on the rotation fulcrum (12). The end of the first balancing section (92) away from the second balancing section (91) is a limiting end (21), and the end of the second balancing section (91) away from the first balancing section (92) is a holding end (22).

3. The door bottom sealing structure according to claim 2, characterized in that, One side of the limiting end (21) is a mating surface, which is used to mate with the blocking member (4) located at the end of the outer end of the door panel's moving path; the other side of the limiting end (21) is a connecting surface, which is used to connect the sealing strip (3).

4. The door bottom sealing structure according to claim 3, characterized in that, The corner structure (25) has a limiting protrusion (6) on the side away from the rotation fulcrum (12). When the balance member (2) rotates around the rotation fulcrum (12), the limiting protrusion (6) is used to restrict the balance member (2) from detaching from the mounting member (1).

5. A door bottom sealing structure according to claim 4, characterized in that, The mounting component (1) is provided as an enclosure structure, which makes the mounting component (1) have an axial cavity (11) formed along its extension direction. An axial opening is provided on one side of the mounting component (1). The rotation fulcrum (12) is located at the axial opening of the mounting component (1). The first balance section (92) extends relative to the axial opening. The second balance section (91) is located in the axial cavity (11) of the enclosure structure.

6. The door bottom sealing structure according to claim 1, characterized in that, The mounting component (1) is provided with end caps (8) on both sides.

7. A door bottom sealing device, comprising the door bottom sealing structure as described in any one of claims 1-6, characterized in that, The balancing component (2) includes a first balancing component (23) and a second balancing component (24) that slide and match each other. The first balancing component (23) is attached to the rotation fulcrum of the mounting component (1), and the second balancing component (24) is placed on the side of the first balancing component (23) away from the mounting component (1).

8. A door bottom sealing device according to claim 7, characterized in that, The balancing element (2) has at least one first balancing element (23) and at least one second balancing element (24), with the at least one first balancing element (23) and the at least one second balancing element (24) arranged alternately.

9. A door bottom sealing device according to claim 7, characterized in that, The mounting component (1) includes a first mounting component (14) and a second mounting component (15). The first mounting component (14) has a mounting groove on one side that slides and matches the second mounting component (15). The second mounting component (15) is also a protective structure with an opening on one side and has a second axial cavity (16). When the second mounting component (15) is slidably sleeved on the first mounting component (14), the second mounting component (15) can slide in the axial cavity (11) of the first mounting component (14). When the first mounting component (14) and the second mounting component (15) cooperate with the balance component (2), the retaining end (22) is located in the communicating cavity formed by the axial cavity (11) and the second axial cavity (16), and the limiting end (21) extends out in sequence.

10. A door bottom sealing device according to claim 9, characterized in that, The mounting component (1) has at least one first mounting component (14) and at least one second mounting component (15), with the at least one first mounting component (14) and at least one second mounting component (15) arranged alternately.

11. A door bottom sealing device according to claim 9, characterized in that, The first mounting component (14) and the second mounting component (15) are slidably fixed by the fixing component (7).

12. A door bottom sealing device according to claim 7, characterized in that, It also includes a blocking member (4), which is a first magnetic attracting member, and a second magnetic attracting member is fixed on the limiting end (21). The first magnetic attracting member can attract the second magnetic attracting member.

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